The presence of Plato s Timaeus in the conceptions of Creation and time in Augustine s Confessions and Commentaries on Genesis can be perceived in three aspects: first, the question whether or not the Cosmos was made from a pre-existing matter, the concept of (chora); in Timaeus and creactio ex nihilo in Augustine; then, on the question about how the Universe was made, that is, the problem of mediation between Ideas and the sensitive world, the role of (demiourgos) in Timaeus and Verbum in Confessions and Commentaries on Genesis. Finally, the question of how the Cosmos is essentially temporal in Timaeus and Augustine. In this dissertation we researched these three aspects in Timaeus, and Augustine s Confessions and Commentaries on Genesis. The historical context of the research is the encounter and synthesis between the Greco-Roman philosophy and the Judeo-Christian tradition regarding the creation of the Cosmos.